Originally Posted by ~Demeter~
DDCC to say I have never, ever heard this.. a urine test does NOT detect HOW MUCH hcg is in your system but rather if you have it in your system. So I can not see how at any point you would have too much hcg in your urine to register on a test.
If you are indeed 9 weeks along you will pop positive definitely on a pregnancy test.
I could not find the specific thread, but I thought it was in "I'm pregnant", however I cannot find it, I MAY have read it at TCOYF, but this was not the first time seeing this exact same story. The OP in that thread was 12 weeks or so pregnant, pregnancy confirmed, found a leftover IC and took it, stark white. Other posters chime in to say they did the same thing, got u/s to confirm they were still pregnant. One person explained that when you are farther along the HCG is too high it invalidates the test and the test reads negative. Once they diluted their urine in a 1:1 ratio, the HPT was beautiful dark. POAS.com also used diluted very pregnant urine for some of her HPT showdowns. A google search came up with this about a specific tests OBs offices can order "9. In cases where very high levels of hCG are present (>500,000 mlU/ml) a false negative result can occur due to a prozone effect. If pregnancy is still suspected, simply dilute the specimen 1:1 with confirmed negative hCG serum or urine and retest."
Anyways, not meaning to steal the thread.